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Novel alternating copolyoxamides with high crystallinity and heat resistance |
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| Authors: | Yuanbo Gao Tingting Yang Xueli Wang Jizong Chen Yong He |
| Institution: | 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, China
Innovation Center for Textile Science and Technology, Donghua University, Shanghai, China Contribution: Data curation (lead), Formal analysis (lead), Investigation (lead), Writing - original draft (lead), Writing - review & editing (lead);2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, China Innovation Center for Textile Science and Technology, Donghua University, Shanghai, China Contribution: Data curation (equal), Formal analysis (equal);3. Innovation Center for Textile Science and Technology, Donghua University, Shanghai, China Contribution: Writing - review & editing (supporting);4. Product R&D, Guangdong Xinhui Meida Nylon Co., Ltd, Jiangmen, China;5. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, China |
| Abstract: | Two series of novel alternating copolyoxamides (PAnT-alt-n2 and PAn2-alt-62) are synthesized via solution/solid-state polycondensation (SSP). The alternating structures are analyzed carefully with 1H NMR and 13C NMR spectra. The melting behaviors, thermal stabilities, crystal structures and crystallinities are systematically evaluated by DSC, TGA and WAXD. The results reveal that these alternating copolyoxamides possess almost perfect alternating chain structures and have high melting temperature (Tm > 270 °C), high crystallinity (Xc > 32%) and high decomposition temperature (T5 > 405 °C) as well as low saturated water absorption (<3.5 wt%), which suggests that they have high potential as engineering plastic of high heat resistant. |
| Keywords: | alternating copolyoxamide crystallinity heat-resistance synthesis |